Budget for context tokens

Keep output space aside and calculate input capacity wey remain.

Your numbers

Input budget wey still remain

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Use the actual tokenizer and provider limits. E no fetch or verify context windows, output caps, hidden overhead or prices here.

Formula

Use A = W−S−H−O. W na context capacity, S na system and tool tokens, H na existing history, O na reserved output, and A na input capacity wey remain. All di terms na token counts.

Keep output space aside and calculate input capacity wey remain.

Example wey show the calculation

Model context-window size (tokens): 32000
Tokens for system and tools: 2000
Tokens for history wey already dey: 10000
Tokens wey you reserve for output: 4000
Tokens for each new document chunk: 2000

Input budget wey still remain: 16,000 tokens
Whole new chunks wey fit enter: 8
Amount wey pass di budget: 0 tokens

Where e fit work and limits

Use the actual tokenizer and provider limits. E no fetch or verify context windows, output caps, hidden overhead or prices here.

We check inputs for missing values and allowed ranges. Result wey pass the finite numeric range no go show. Rounding affect wetin display, while calculation use the model numeric precision.

Check your units and assumptions before you rely on result. Changing label no convert currency or physical unit.

Version of di formula: 3863a060f33a · Example don get check: 2026-10-30

Method